It would be bad enough, as I reported last week, that 47 billionaires were responsible for the lion's share of individual Super PAC contributions. It turns out that the Super PACs aren't even the biggest players. The biggest players are the dark money PACs, which do not have to reveal the sources of their funding. Crossroads GPS, founded by Karl Rove and backed by anonymous big-money donors, has bought negative attack ads against President Obama to the tune of $52 million!